99557243 has 8 divisors (see below), whose sum is σ = 101210112. Its totient is φ = 97909416.

The previous prime is 99557239. The next prime is 99557273. The reversal of 99557243 is 34275599.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99557243 - 2² = 99557239 is a prime.

It is a super-2 number, since 2×99557243² = 19823289267522098, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99557194 and 99557203.

It is not an unprimeable number, because it can be changed into a prime (99557273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72146 + ... + 73512.

It is an arithmetic number, because the mean of its divisors is an integer number (12651264).

Almost surely, 2^99557243 is an apocalyptic number.

99557243 is a deficient number, since it is larger than the sum of its proper divisors (1652869).

99557243 is a wasteful number, since it uses less digits than its factorization.

99557243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2521.

The product of its digits is 340200, while the sum is 44.

The square root of 99557243 is about 9977.8375913822. The cubic root of 99557243 is about 463.4728378757.

The spelling of 99557243 in words is "ninety-nine million, five hundred fifty-seven thousand, two hundred forty-three".